In this issue, Dr. François Bertel discusses a new volume rendering technique for regular, rectilinear grids which utilizes the power of GPU in order to accelerate ray casting. Bill Hoffman details the new features of CMake 2.6, the first major release of CMake since May 2006. Some of our most influential Insight Toolkit (ITK) users and developers discuss the issue of backward compatibility to express the complexity of the issue and the variety of diverse opinions about this topic in the community. And Utkarsh Ayachit provides a use-case driven approach to demonstrate how selection can be described and used to support quantitative analysis in ParaView 3.

Editor’s Note......................................................................... 1
Recent Releases .................................................................. 1
GPU Ray Casting in VTKEdge ................................................ 3
Backward Compatibility in ITK .............................................. 5
Selecting Data in ParaView.................................................... 7
CMake 2.6 .......................................................................... 11
In Progress ......................................................................... 13
Kitware News ...................................................................... 14